CN203615353U - Desulphurization system of coal power generating unit - Google Patents
Desulphurization system of coal power generating unit Download PDFInfo
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- CN203615353U CN203615353U CN201320865266.3U CN201320865266U CN203615353U CN 203615353 U CN203615353 U CN 203615353U CN 201320865266 U CN201320865266 U CN 201320865266U CN 203615353 U CN203615353 U CN 203615353U
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- booster fan
- flue
- desulphurization system
- fan
- desulphurization
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- 239000003245 coal Substances 0.000 title claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims description 52
- 238000006477 desulfuration reaction Methods 0.000 claims description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 48
- 239000007789 gas Substances 0.000 claims description 17
- 238000013459 approach Methods 0.000 claims description 15
- 238000010248 power generation Methods 0.000 claims description 15
- 230000006698 induction Effects 0.000 claims description 2
- 239000000779 smoke Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000007257 malfunction Effects 0.000 abstract 1
- 230000023556 desulfurization Effects 0.000 description 24
- 230000007613 environmental effect Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model provides a desulphurization system of a coal power generating unit. The desulphurization system comprises a boiler exhaust fan, a pressurizing fan, a desulphurization absorption tower and a chimney, wherein the boiler exhaust fan is connected with an inlet of the pressurizing fan through a flue, an outlet of the pressurizing fan is connected with an inlet of the desulphurization tower through a flue, an outlet of the desulphurization tower is connected with the chimney through a smoke purifying passage on the outlet of the desulphurization tower, and the desulphurization system also comprises a pressurizing fan bypass flue, a pressure transmitter is arranged in the inlet of the pressurizing fan, one end of the pressurizing fan bypass flue is arranged on the front end, with the pressure transmitter, of the pressurizing fan, the other end is arranged in the outlet of the pressurizing fan, the pressure transmitter is connected with a DCS (distributed control system) control room through a conducting wire. By adopting the desulphurization system, the stability in running of a main machine of a power plant is guaranteed, the stability in running is achieved, the malfunction of the unit is effectively avoided, the energy consumption of the desulphurization system is reduced, an environment-friendly requirement of the smoke emission is met, the overhauling requirement of the desulphurization pressurizing fan is met, and the economic significance is important.
Description
Technical field
The utility model belongs to flue gases purification field, particularly a kind of desulphurization system of coal fired power generation unit.
Background technology
Along with industrial expansion, the sulfur dioxide pollution of coal-fired power plant produces deeper and deeper harm to natural environment and human lives, and this problem is also dealt with the effective desulfurization measure of various advanced persons in numerous power plants.The leading technique that flue gas desulfurization FGD (Flue gas desulfurization) technique is current flue gas desulfurization, a kind of desulfurization method that Ye Shi coal-fired power plant mainly takes, conventionally in coal-fired unit, corresponding desulphurization system can be set, the former flue gas that coal combustion in power generation process is produced passes through a series of processing of desulphurization system and is disposed to the external world.
Existing Coal-fired group desulphurization system cigarette wind part basic comprising is that air-introduced machine adds pressure fan pattern, booster fan claims again desulfurization blower fan (Boost Fan, BF) be for overcoming FGD(flue gas desulfurization) device flue gas resistance, former flue gas is introduced to desulphurization system, and the capital equipment of stable boiler induced-draft fan outlet pressure.Its operation characteristic low-head, large flow, the slow-speed of revolution.In the situation that installing desulfurizer additional, the flue gas resistance that boiler send, air-introduced machine cannot overcome FGD, so when boiler installs FGD device additional, must arrange booster fan (BF).
In wet desulfurizing process system, the flue gas coming from boiler induced-draft fan enters washing desulphurization in absorption tower, sends back-end ductwork back to and enter smoke stack emission after desulfurization.Because smoke gas flow is through resistance devices such as former flue, flue gas heat-exchange unit (GGH), absorption tower, clean flue, baffle doors, booster fan need be set overcome the resistance of whole desulphurization system equipment.Thereby booster fan is the visual plant that guarantees desulphurization system runnability and reliability.
In wet desulfurization system, conventionally between boiler induced-draft fan outlet and the entrance of chimney, be parallel with bypass flue, the Main Function of bypass flue is in the time that booster fan, FGD device break down, boiler smoke is entered to smoke stack emission by bypass flue, without desulfuration absorbing tower, guarantee the normal operation of the whole unit of desulphurization system, but flue gas desulfurization discharge does not reach environmental requirement.
National development was combined with the reform committee and national environmental protection portion and was issued about expressly providing in " coal fired generator set desulfurization electricity price and desulfurization facility operation management method " in June, 2007: when new (expansions) builds coal-fired Construction of Unit desulfurization facility, encouragement does not arrange gas bypass passage, the Desulphurization for Coal-fired Power Plant facility that desulfurization facility has been installed do not move or operational percentage lower, must correspondingly reduce desulfurization electricity price, prevent deliberately idle desulfurization facility of electricity power enterprise.State Environmental Protection Administration's " flue gas desulphurization engineering legislation limestone/lime-gypsum " is relevant provision regulation (HJ/T179-2005): newly-built generating set construction desulfurization facility or operating unit are set up desulfurization facility, and bypass flue should not be set.Ring is done (2010) No. 91 " implementing the notice of lead sealing about Thermal Power Enterprises desulfurization facility bypass damper " and is required environmental administrations at different levels and each Utilities Electric Group Co. will actively encourage Thermal Power Enterprises progressively to remove the bypass flue of built desulfurization facility, to temporary transient reservation bypass flue, all by-pass dampers must be carried out lead sealing.
Thereby coal-fired power plant carries out shutoff according to relevant regulations by existing bypass flue in Coal-fired group desulphurization system, but after bypass flue shutoff, in the time that booster fan breaks down, affect the stable operation of Power Plant; And be unfavorable for the maintenance of booster fan.
Utility model content
In order to overcome after bypass flue shutoff, when booster fan breaks down, affect the stable operation of Power Plant, and be unfavorable for the shortcoming of booster fan maintenance, the utility model provides a kind of desulphurization system of coal fired power generation unit, guaranteed the stable operation of power plant's main frame, desulphurization system stable operation, has avoided the generation of unit fault effectively, reduce the energy consumption of desulphurization system, reach the environmental requirement of fume emission, met the maintenance of desulfurization booster fan simultaneously, there is great economic implications.
The utility model solves the technical scheme that its technical problem adopts: a kind of desulphurization system of coal fired power generation unit, comprise boiler induced-draft fan, booster fan, desulfuration absorbing tower and chimney, boiler induced-draft fan is connected with the entrance of booster fan by flue, the outlet of booster fan is connected with the entrance of desulfuration absorbing tower by flue, the outlet of desulfuration absorbing tower exports clean flue by desulfuration absorbing tower and is connected with chimney, it is characterized in that, in desulphurization system, also comprise booster fan bypass flue, be provided with the pressure transmitter of induction booster fan inlet flue gas pressure in the porch of booster fan, one end of booster fan bypass flue is located at booster fan and is provided with the front end of pressure transmitter, the other end is arranged on booster fan exit, pressure transmitter is connected with the DCS control room of controlling bypass flue switching by wire.
Flue comprises the first flue, the second flue, booster fan gas approach and booster fan exhaust pass, air-introduced machine is connected with the entrance of booster fan by the first flue, booster fan gas approach, the outlet of booster fan is connected with desulfuration absorbing tower by booster fan exhaust pass, the second flue, and pressure transmitter is arranged on booster fan gas approach.
One end of booster fan bypass flue is communicated with the entrance of booster fan gas approach, and the other end is communicated with the outlet of booster fan exhaust pass.
Booster fan bypass flue is provided with the automatic damper door that stops that flue gas passes through, and automatic damper door is according to the signal automatic shutter in DCS control room.
In the time of booster fan inlet flue gas pressure > 1.5KPa or booster fan inlet flue gas pressure <-1.5KPa, signal is transferred to DCS control room by pressure transmitter, pneumatic baffle door is opened automatically according to the interlocking signal in DCS control room, booster fan automatic trip.
When booster fan inlet flue gas pressure be >=when-1.5KPa or booster fan inlet flue gas pressure≤1.5KPa, signal is transferred to DCS control room by pressure transmitter, booster fan starts, pneumatic baffle door is closed automatically according to the interlocking signal in DCS control room.
Export on clean flue and be provided with the baffle door that stops that flue gas passes through at desulfuration absorbing tower, the maintenance of desulphurization system after stopping transport for power plant's main frame.
The beneficial effects of the utility model are, guarantee the stable operation of power plant's main frame, desulphurization system stable operation, effectively avoid the generation of unit fault, reduce the energy consumption of desulphurization system, reach the environmental requirement of fume emission, met the maintenance of desulfurization booster fan simultaneously, there is great economic implications.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the desulphurization system of coal fired power generation unit described in the utility model is specifically described.
Fig. 1 is desulphurization system flow logic schematic diagram of the present utility model.
As shown in the figure, air-introduced machine 1, booster fan 2, desulfuration absorbing tower 3, chimney 4, booster fan bypass flue 5, pressure transmitter 6, DCS control room 7, the first flues 8, the second flue 9, booster fan gas approach 10, booster fan exhaust pass 11, pneumatic baffle door 12, desulfuration absorbing tower exports clean flue 13, baffle door 14.
The specific embodiment
The desulphurization system of the utility model coal fired power generation unit, comprises boiler induced-draft fan 1, booster fan 2, desulfuration absorbing tower 3 and chimney 4.Boiler induced-draft fan 1 is connected with the entrance of booster fan 2 by flue, and the outlet of booster fan 2 is connected with the entrance of desulfuration absorbing tower 3 by flue, and the outlet of desulfuration absorbing tower 3 exports clean flue 13 by desulfuration absorbing tower and is connected with chimney 4.
In desulphurization system, also comprise booster fan bypass flue 5.Be provided with pressure transmitter 6 in the porch of booster fan 2, for responding to booster fan 2 inlet flue gas pressure, pressure transmitter 6 is connected with DCS control room 7 by wire.One end of booster fan bypass flue is located at booster fan and is provided with the front end of pressure transmitter, the other end is arranged on booster fan exit, be that booster fan bypass flue is in parallel together with pressure transmitter by booster fan, in the time that booster fan 2 breaks down or need to overhaul, pressure transmitter 6 is experienced the pressure of booster fan 2 porch flue gases, signal is constantly delivered in DCS control room 7, through the logic judgement in DCS control room 7, logical interlock, control the open-minded of booster fan bypass flue 5, flue gas is entered and in desulfuration absorbing tower 3, is carried out desulfurization by booster fan bypass flue 5, prevent that a large amount of flue gases are gathered in booster fan 2 place's pressure and increase, affect the stability of unit.When booster fan 2 trouble shootings or overhaul when complete, pressure transmitter 6 is experienced the pressure of booster fan 2 porch flue gases, signal is constantly delivered in DCS control room 7, through the logic judgement in DCS control room 7, control the closure of booster fan bypass flue 5, flue gas is entered and in desulfuration absorbing tower 3, is carried out desulfurization by booster fan 2 places.
Flue comprises the first flue 8, the second flue 9, booster fan gas approach 10 and booster fan exhaust pass 11.Air-introduced machine 1 is connected with the entrance of booster fan 2 by the first flue 8, booster fan gas approach 10, and the outlet of booster fan 2 is connected with desulfuration absorbing tower 3 by booster fan exhaust pass 11, the second flue 9.Pressure transmitter 6 is plugged on booster fan gas approach 10 by wire, can detect better the pressure that increases fans entrance place flue gas, improves the degree of accuracy detecting.
One end of booster fan bypass flue 5 is communicated with the entrance of booster fan gas approach 10, and the other end is communicated with the outlet of booster fan exhaust pass 11.Pressure transmitter 6 is plugged on booster fan gas approach 10 by wire, be equivalent to connect with booster fan 2, booster fan bypass flue 5 is connected in parallel on the two ends of pressure transmitter 6 and booster fan 2, in the time that pressure transmitter 6 is experienced booster fan inlet flue gas pressure and is exceeded certain scope, can make flue gas enter fast booster fan bypass flue 5, guarantee the stable operation of unit entirety.6 inlet flue gas pressure for detection of booster fan 2 of pressure transmitter, can not detect the flue gas pressures of booster fan bypass flue 5, thereby booster fan bypass flue 5 is connected in parallel on the two ends of pressure transmitter 6 and booster fan 2.
On booster fan bypass flue 5, be provided with the pneumatic baffle door 12 that stops that flue gas passes through, pneumatic baffle door 12 is according to the signal automatic shutter in DCS control room 7, opening/closing time only has 15 seconds, do not need manually artificial, human resources are saved, convenient and swift, save the time that people is open and close, thereby improved set steady.
In the time of booster fan inlet flue gas pressure >=-1.5KPa or booster fan inlet flue gas pressure≤1.5KPa, booster fan 2 is normally worked, and booster fan bypass flue 5 is closed state.
In the time of booster fan inlet flue gas pressure > 1.5KPa or booster fan inlet flue gas pressure <-1.5KPa, pressure transmitter 6 passes the signal along to DCS control room 7, logic judgement is carried out to signal in DCS control room 7, in the time confirming that this signal is opened booster fan bypass flue 5 for closing booster fan 2, there is chain reaction, pneumatic baffle door 12 on booster fan bypass flue 5 is opened automatically according to the signal in DCS control room 7, booster fan 2 automatic trips, flue gas is entered in desulfuration absorbing tower 3 by booster fan bypass flue 5, carry out desulphurization reaction, discharge by chimney 4 more afterwards.
In the time that booster fan inlet flue gas pressure returns to booster fan inlet flue gas pressure >=-1.5KPa or booster fan inlet flue gas pressure≤1.5KPa, pressure transmitter 6 passes the signal along to DCS control room 7, logic judgement is carried out to signal in DCS control room 7, in the time confirming that this signal is opened booster fan 2 for closing booster fan bypass flue 5, there is chain reaction, booster fan 2 starts automatically, pneumatic baffle door 12 on booster fan bypass flue 5 is according to the Automatic shutting-down of signal in DCS control room 7, flue gas is entered in desulfuration absorbing tower 3 by booster fan 2, carry out desulphurization reaction, discharge by chimney 4 more afterwards.
Export on clean flue 13 and be provided with the baffle door 14 that stops that flue gas passes through at desulfuration absorbing tower, desulphurization system maintenance after stopping transport for power plant's main frame.
The desulphurization system of the utility model coal fired power generation unit, coal-fired power plant according to relevant regulations by Coal-fired group desulphurization system, existing bypass flue carries out shutoff in the situation that, on booster fan gas approach, be inserted with pressure transmitter by wire, experience the inlet flue gas pressure of booster fan, and the signal of inlet flue gas pressure is transferred to DCS control room, and booster fan bypass flue is connected in parallel on the two ends of booster fan and pressure transmitter, in the time that booster fan breaks down or need to overhaul, opening booster fan bypass flue passes through flue gas, guarantee the safe and stable operation of whole Power Plant, effectively avoid the generation of unit fault, reduce the energy consumption of desulphurization system, cost-saving, there is great economic implications.
The above is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, although the utility model discloses as above with preferred embodiment, but not in order to limit the utility model, any technical staff who is familiar with this patent is not departing within the scope of technical solutions of the utility model, when can utilizing the technology contents of above-mentioned prompting to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solutions of the utility model, any simple modification of above embodiment being done according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of the utility model scheme.
Claims (7)
1. the desulphurization system of a coal fired power generation unit, comprise boiler induced-draft fan (1), booster fan (2), desulfuration absorbing tower (3) and chimney (4), described boiler induced-draft fan (1) is connected with the entrance of booster fan (2) by flue, the outlet of described booster fan (2) is connected with the entrance of desulfuration absorbing tower (3) by flue, the outlet of described desulfuration absorbing tower (3) exports clean flue (13) by desulfuration absorbing tower and is connected with chimney, it is characterized in that, in described desulphurization system, also comprise booster fan bypass flue (5), be provided with the pressure transmitter (6) of induction booster fan inlet flue gas pressure in the porch of described booster fan (2), one end of described booster fan bypass flue (5) is located at booster fan (2) and is provided with the front end of pressure transmitter (6), the other end is arranged on booster fan exit, described pressure transmitter (6) is connected with the DCS control room (7) of controlling bypass flue switching by wire.
2. the desulphurization system of a kind of coal fired power generation unit according to claim 1, it is characterized in that, described flue comprises the first flue (8), the second flue (9), booster fan gas approach (10) and booster fan exhaust pass (11), described air-introduced machine (1) is by the first flue (8), booster fan gas approach (10) is connected with the entrance of booster fan (2), the outlet of described booster fan (2) is by booster fan exhaust pass (11), the second flue (9) is connected with desulfuration absorbing tower (3), described pressure transmitter (6) is plugged on booster fan gas approach (10) by wire.
3. the desulphurization system of a kind of coal fired power generation unit according to claim 2, it is characterized in that, one end of described booster fan bypass flue (5) is communicated with the entrance of booster fan gas approach (10), and the other end is communicated with the outlet of booster fan exhaust pass (11).
4. the desulphurization system of a kind of coal fired power generation unit according to claim 1, it is characterized in that, described booster fan bypass flue (5) is provided with the pneumatic baffle door (12) that stops that flue gas passes through, and described pneumatic baffle door (12) is according to the signal automatic shutter in DCS control room.
5. the desulphurization system of a kind of coal fired power generation unit according to claim 4, it is characterized in that, in the time of described booster fan inlet flue gas pressure > 1.5KPa or booster fan inlet flue gas pressure <-1.5KPa, signal is transferred to DCS control room (7) by described pressure transmitter (6), described pneumatic baffle door (12) is opened automatically according to the interlocking signal in DCS control room, described booster fan (2) automatic trip.
6. the desulphurization system of a kind of coal fired power generation unit according to claim 4, it is characterized in that, when described booster fan inlet flue gas pressure be >=when-1.5KPa or booster fan inlet flue gas pressure≤1.5KPa, signal is transferred to DCS control room (7) by described pressure transmitter (6), described booster fan (2) starts, and described pneumatic baffle door (12) is closed automatically according to the interlocking signal in DCS control room.
7. the desulphurization system of a kind of coal fired power generation unit according to claim 1, is characterized in that, exports and on clean flue (13), is provided with the baffle door (14) that stops flue gas and pass through at described desulfuration absorbing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320865266.3U CN203615353U (en) | 2013-12-25 | 2013-12-25 | Desulphurization system of coal power generating unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320865266.3U CN203615353U (en) | 2013-12-25 | 2013-12-25 | Desulphurization system of coal power generating unit |
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| CN203615353U true CN203615353U (en) | 2014-05-28 |
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| CN201320865266.3U Expired - Lifetime CN203615353U (en) | 2013-12-25 | 2013-12-25 | Desulphurization system of coal power generating unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696941A (en) * | 2014-12-30 | 2015-06-10 | 大唐韩城第二发电有限责任公司 | Starting and recovery method for generator set during non-mechanical abnormality of booster fan |
| CN109852451A (en) * | 2018-12-21 | 2019-06-07 | 中国神华能源股份有限公司 | The control method and control device of desulphurization system |
| CN113623672A (en) * | 2021-06-24 | 2021-11-09 | 有能集团江苏威同电气设备有限公司 | Built-in smoke and air isolation system of plug board isolation door |
-
2013
- 2013-12-25 CN CN201320865266.3U patent/CN203615353U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696941A (en) * | 2014-12-30 | 2015-06-10 | 大唐韩城第二发电有限责任公司 | Starting and recovery method for generator set during non-mechanical abnormality of booster fan |
| CN109852451A (en) * | 2018-12-21 | 2019-06-07 | 中国神华能源股份有限公司 | The control method and control device of desulphurization system |
| CN109852451B (en) * | 2018-12-21 | 2021-08-10 | 中国神华能源股份有限公司 | Control method and control device for desulfurization system |
| CN113623672A (en) * | 2021-06-24 | 2021-11-09 | 有能集团江苏威同电气设备有限公司 | Built-in smoke and air isolation system of plug board isolation door |
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Address after: 100097 Beijing city Haidian District Zizhu Road No. 120 Patentee after: DATANG ENVIRONMENT INDUSTRY GROUP Co.,Ltd. Address before: 100097 Beijing city Haidian District Zizhu Road No. 120 Patentee before: DATANG TECHNOLOGY INDUSTRY GROUP CO.,LTD. Address after: 100097 Beijing city Haidian District Zizhu Road No. 120 Patentee after: DATANG TECHNOLOGY INDUSTRY GROUP CO.,LTD. Address before: 100097 Beijing city Haidian District Zizhu Road No. 120 Patentee before: DATANG TECHNOLOGY INDUSTRY Co.,Ltd. |
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Granted publication date: 20140528 |